It will not be necessary to explain the threading of the comber-board, as this is always done on the same plain principles. The four heddles of the first row deep of comber-board emerge below the board at the beginning of the first division, marked a, a´, a´´, a´´´. The first row deep in comber-board in the first division, and the last row deep in comber-board in the third division only are shown; but as these two rows also indicate the first and last rows in the Jacquard machine, and as the principle of a, a´, a´´, a´´´, and b, b´, b´´, b´´´, has to be observed in every one of these 75 rows deep in width of comber-board E´ to E´´ taken, it will explain the tie-up for the entire number. At c, in leash a, four distinct heddles are adjusted; the same thing is repeated in every one of the eight leashes extended in drawing below the comber-board, giving in return, thus: four heddles and three divisions in a 100 machine = 4 × 3 × 100, or 1200 warp-threads for the entire fabric.
Now, following the first heddle downwards on leash 1, a, c, marked on drawing, d, (indicated by dotted lines), No. 1 harness of the compound harness, H, is reached. The cross X on this harness indicates that the warp-thread drawn through mail fastened on heddle, d, must also be drawn through No. 1 harness; the next heddle from the same leash will reach No. 2 harness; and so on until No. 4 harness is taken up, which will finish No. 1 harness-cord of No. 1 leash in the first division. The second harness-cord, a´, will use harness 5, 6, 7, 8; the third harness-cord, a´´, will use harness 1, 2, 3, 4, over again, as used by a; the fourth harness-cord, a´´´, will use harness 5, 6, 7, 8, over again, as used by a´.
Continue in this manner until leash 100 in the first division on harness 5, 6, 7, 8, is finished. The second and third divisions strictly repeat the first.
Fig. LXVIII.
[Fig. LXIX.] represents the side elevation for [Fig. LXVI.] In both of these drawings some of the letters and figures correspond, as follows: harness-cords a, a´, a´´, a´´´, in first row deep of comber-board, E, E´. H shows compound harness set 1, 2, 3, 4, 5, 6, 7, 8; figures 1, 2, 3, 4, on top of comber-board represent the first row deep from the front elevation in drawing.
New letters: B, the warp-beam; Z, the lease of the warp formed by rods, Z´ and Z´´; O, the distance between the Jacquard harness and compound harness set, H. D, the shed, as formed in loom when weaving. For illustration of this shed pick No. 7 in [Fig. LXVIII.], shows that leashes 2 and 3, or a´ and a´´, are raised at the same time. Leashes 1 and 4, or a and a´´´, are not raised.
The principle of forming the shed for picking the shuttle will be more particularly explained later on by Figs. [LXX.] to [LXXV].